.box{
    width:420px;
    height:800px;
    background-color:white;
}
.box-0{
    width:420px;
    height:100px;
}


.li{
    float:left;
    margin-left:10px;
    list-style-type: none;
}
.b{
    color:black;
    font-size:20px;
}